''Beet pseudoyellows virus'' (BPYV) is a species of virus in the genus '' Crinivirus''. The virus was first recognised by James E. Duffus of the

United States Department of Agriculture The United States Department of Agriculture (USDA) is the United States federal executive departments, federal executive department responsible for developing and executing federal laws related to farming, forestry, rural economic development, ...

, and reported in 1975 under the title 'A new type of whitefly-transmitted disease – a link to the aphid-transmitted viruses'. Beet (''

Beta vulgaris ''Beta vulgaris'' (beet) is a species of flowering plant in the subfamily Betoideae of the family Amaranthaceae. Economically, it is the most important crop of the large order Caryophyllales. It has several cultivar groups: the sugar beet, of gre ...

'') in a research greenhouse unexpectedly presented symptoms characteristic of the

aphid Aphids are small sap-sucking insects and members of the superfamily Aphidoidea. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white woolly aphids. A t ...

-vectored virus ''

Beet yellows virus Beet yellows virus (BYV) is a plant pathogenic virus of the family '' Closteroviridae''. Beet yellows virus is transmitted by multiple species of aphid and causes a yellowing disease in ''Beta vulgaris'' and ''Spinacia oleracea Spinach ('' ...

'', despite no aphids being present. Instead, greenhouse whiteflies (''

Trialeurodes vaporariorum ''Trialeurodes vaporariorum'', commonly known as the glasshouse whitefly or greenhouse whitefly, is an insect that inhabits the world's temperate regions. Like various other whiteflies, it is a primary insect pest of many fruit, vegetable and or ...

'') were present and determined to be the vector. The presumed new species of virus was designated 'Beet pseudo-yellows virus' (note the hyphen, omitted in the currently accepted name). Further investigation revealed the virus typically causes stunting, interveinal yellowing, and/or

chlorotic In botany, chlorosis is a condition in which leaves produce insufficient chlorophyll. As chlorophyll is responsible for the green color of leaves, chlorotic leaves are pale, yellow, or yellow-white. The affected plant has little or no ability to ...

spotting in its hosts, and that at least an additional 36 species of plants from various families are susceptible to infection.

Images

File:2018-06-01 (130) Leaves of Beta vulgaris (beetroot) at Bichlhäusl in Frankenfels, Austria.jpg, ''Beta vulgaris'' (uninfected individual) – first known host and namesake File:Trialeurodes vaporariorum 34941498.jpg, ''Trialeurodes vaporariorum'' – vector Image:RF01095.png, 3'-terminal pseudoknot of BPYV: Predicted secondary structure fro
Rfam
Famil
RF01095

References

External links

Image and general information
at Seminis
Images
at Texas A&M AgriLife Extension
Rfam entry for 3'-terminal pseudoknot of BPYV
Crinivirus {{Virus-stub